/**
 * 
 */
$(document).ready(function(){
	var $liCur = $(".nav ul li.cur"),
	curP = $liCur.position().left,
	curW = $liCur.outerWidth(true),
	$slider = $(".curBg"),
	$navBox = $(".nav");
	$targetEle = $(".nav ul li a"),
	$slider.animate({
		"left":curP,
		"width":curW
	});
	$targetEle.mouseenter(function () {
		var $_parent = $(this).parent(),
		_width = $_parent.outerWidth(true),
		posL = $_parent.position().left;
		$slider.stop(true, true).animate({
			"left":posL,
			"width":_width
		}, "fast");
	});
	$navBox.mouseleave(function (cur, wid) {
		cur = curP;
		wid = curW;
		$slider.stop(true, true).animate({
			"left":cur,
			"width":wid
		}, "fast");
	});
})
